Buggy code:
public static final int GROUPING_IN_CONTROLLERS = 2 ; public static final int GROUPING_STORE_FIRST_ONLY = 3 ; public static final int SAMPLER_TYPE_HTTP_SAMPLER = 0 ; public static final int SAMPLER_TYPE_HTTP_SAMPLER2 = 1 ; private long lastTime = 0 ; private static final long sampleGap = JMeterUtils . getPropDefault ( "proxy.pause" , 1000 ) ; private boolean addAssertions ; private int groupingMode ; private boolean samplerRedirectAutomatically ; private boolean samplerFollowRedirects ; private boolean useKeepAlive ; private boolean samplerDownloadImages ; private boolean regexMatch = false ; private JMeterTreeNode target ; public ProxyControl ( ) { } public void setPort ( int port ) { } public void setPort ( String port ) { } public void setCaptureHttpHeaders ( boolean capture ) { } public void setGroupingMode ( int grouping ) { } public void setAssertions ( boolean b ) { } public void setSamplerTypeName ( int samplerTypeName ) { } public void setSamplerRedirectAutomatically ( boolean b ) { } public void setSamplerFollowRedirects ( boolean b ) { } public void setUseKeepAlive ( boolean b ) { } public void setSamplerDownloadImages ( boolean b ) { } public void setIncludeList ( Collection list ) { } public void setExcludeList ( Collection list ) { } public void setRegexMatch ( boolean b ) { } public void setHttpsSpoof ( boolean b ) { } public void setHttpsSpoofMatch ( String s ) { } public void setContentTypeExclude ( String contentTypeExclude ) { } public void setContentTypeInclude ( String contentTypeInclude ) { } public String getClassLabel ( ) { } public boolean getAssertions ( ) { } public int getGroupingMode ( ) { } public int getPort ( ) { } public String getPortString ( ) { } public int getDefaultPort ( ) { } public boolean getCaptureHttpHeaders ( ) { } public int getSamplerTypeName ( ) { } public boolean getSamplerRedirectAutomatically ( ) { } public boolean getSamplerFollowRedirects ( ) { } public boolean getUseKeepalive ( ) { } public boolean getSamplerDownloadImages ( ) { } public boolean getRegexMatch ( ) { } public boolean getHttpsSpoof ( ) { } public String getHttpsSpoofMatch ( ) { } public String getContentTypeExclude ( ) { } public String getContentTypeInclude ( ) { } public Class getGuiClass ( ) { } public void addConfigElement ( ConfigElement config ) { } public void startProxy ( ) { } public void addExcludedPattern ( String pattern ) { } public CollectionProperty getExcludePatterns ( ) { } public void addIncludedPattern ( String pattern ) { } public CollectionProperty getIncludePatterns ( ) { } public void clearExcludedPatterns ( ) { } public void clearIncludedPatterns ( ) { } public JMeterTreeNode getTarget ( ) { } public void setTarget ( JMeterTreeNode target ) { } public synchronized void deliverSampler ( HTTPSamplerBase sampler , TestElement [ ] subConfigs , SampleResult result ) { } public void stopProxy ( ) { } boolean filterUrl ( HTTPSamplerBase sampler ) { } boolean filterContentType ( SampleResult result ) { } private void addAssertion ( JMeterTreeModel model , JMeterTreeNode node ) throws IllegalUserActionException { } private void addDivider ( JMeterTreeModel model , JMeterTreeNode node ) throws IllegalUserActionException { } private void addSimpleController ( JMeterTreeModel model , JMeterTreeNode node , String name ) throws IllegalUserActionException { } private void addTimers ( JMeterTreeModel model , JMeterTreeNode node , long deltaT ) { } private JMeterTreeNode findFirstNodeOfType ( Class type ) { } private JMeterTreeNode findTargetControllerNode ( ) { } private Collection findApplicableElements ( JMeterTreeNode myTarget , Class myClass , boolean ascending ) { JMeterTreeModel treeModel = GuiPackage . getInstance ( ) . getTreeModel ( ) ; LinkedList elements = new LinkedList ( ) ; Enumeration kids = treeModel . getNodeOf ( this ) . children ( ) ; while ( kids . hasMoreElements ( ) ) { JMeterTreeNode subNode = ( ( JMeterTreeNode ) ( kids . nextElement ( ) ) ) ; if ( subNode . isEnabled ( ) ) { TestElement element = ( ( TestElement ) ( subNode . getUserObject ( ) ) ) ; if ( myClass . isInstance ( element ) ) { if ( ascending ) elements . addFirst ( element ) ; else elements . add ( element ) ; } } } for ( JMeterTreeNode controller = myTarget ; controller != null ; controller = ( ( JMeterTreeNode ) ( controller . getParent ( ) ) ) ) { kids = controller . children ( ) ; while ( kids . hasMoreElements ( ) ) { JMeterTreeNode subNode = ( ( JMeterTreeNode ) ( kids . nextElement ( ) ) ) ; if ( subNode . isEnabled ( ) ) { TestElement element = ( ( TestElement ) ( subNode . getUserObject ( ) ) ) ; if ( myClass . isInstance ( element ) ) { <START_BUG> ProxyControl . log . debug ( ( "Applicable:<seq2seq4repair_space>" + ( element . getPropertyAsString ( NAME ) ) ) ) ; <END_BUG> if ( ascending ) elements . addFirst ( element ) ; else elements . add ( element ) ; } if ( element instanceof TestPlan ) { TestPlan tp = ( ( TestPlan ) ( element ) ) ; Arguments args = tp . getArguments ( ) ; if ( myClass . isInstance ( args ) ) { if ( ascending ) elements . addFirst ( args ) ; else elements . add ( args ) ; } } } } } return elements ; } private void placeSampler ( HTTPSamplerBase sampler , TestElement [ ] subConfigs , JMeterTreeNode myTarget ) { } private void removeValuesFromSampler ( HTTPSamplerBase sampler , Collection configurations ) { } private String generateMatchUrl ( HTTPSamplerBase sampler ) { } private boolean matchesPatterns ( String url , CollectionProperty patterns ) { } private void replaceValues ( TestElement sampler , TestElement [ ] configs , Collection variables ) { } private void notifySampleListeners ( SampleEvent event ) { } private void notifyTestListenersOfStart ( ) { } private void notifyTestListenersOfEnd ( ) { } public boolean canRemove ( ) { } }

Fix:
ProxyControl . log . debug ( ( "Applicable:<seq2seq4repair_space>" + ( element . getName ( ) ) ) ) ;